Fire alarm



FIG. 1 is a front perspective view of a fire alarm embodying our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof, as seen from the right-hand side of FIG. 2; and,

FIG. 7 is a side view thereof, as seen from the left-hand side of FIG. 2. 

CLAIM The ornamental design for a fire alarm, as shown and described. 